[en] I summarize the results obtained in the UA1 experiment on the production of bottom quarks in proton-antiproton collisions at √s = 0.63 TeV. Independent muon data samples are used to measure the bottom quark production cross-section in different transverse momentum ranges from 6 to 30 GeV. The measured cross-section cannot be explained by lowest order QCD calculations only. A recent theoretical calculation to O(α_s³) of the inclusive bottom quark transverse momentum spectrum in hadronic collisions shows reasonable agreement with the data. The shape of the O(α_s³) spectrum is used to estimate the total cross-section for production of bottom quark pairs: σ(bantib) = 10.2± 3.3μb

[en] A review of recent experimental development in large transverse momentum physics is given with emphasis on the jet structure of large transverse momentum events as observed in the Split Field Magnet (SFM) Facility at the CERN ISR

[en] UA1 is continuing its search for new heavy quarks in the muon channel, using 1.3 pb^-1 of new data taken during the CERN pantip Collider run in the autumn of 1988. The properties of isolated muons accompanied by jets are consistent with the predictions from the Standard Model but do not show a signal for a new heavy quark. Combining all the UA1 data and using all the channels available, a new lower limit on the mass is obtained at 56 GeV/c² for the t-quark

[en] It is probable that LEP detectors will often include 4π calorimeters. Since this is a novel technique, not much expertise exists yet in the field of pattern recognition for large calorimeter systems. A fast method to simulate calorimeter signals, based on an analytical parmametrization of electromagnetic and hadronic showers, developed by the UA1 software group on calorimetry, is presented. Some reconstruction problems are discussed, in particular the question of disentangling individual showers within an energetic jet. (Auth.)

[en] A review of recent experimental developments in large transverse momentum physics is given with emphasis on the jet structure of large P(trans) events as observed in the Split Field Magnet (SFM) Facility at the CERN ISR. (orig.)

[en] We present the results of a test in an electron-hadron beam (5-90 GeV) of the prototype of a position detector. This position detector consists of proportional tubes with charge division readout, giving the position and a coarse value of the shower energy. This detector will be used in the end cap electromagnetic calorimeter (bouchon) of the UAl experiment (CERN anti pp collider). We give results on the properties of the tubes and on the development of the shower in the lead-plastic sandwich

[en] Nine papers were presented at the Conference. All of them have been abstracted and indexed for INIS. Stress was put upon the important new aspects in weak, electromagnetic and strong interactions

No abstract available